Tube



Dec. 5, 1933. R HAFF 1,937,516

' TUBE Filed Jan. 22, 1952 ATTORNEY Patented Dec. 5, 1933 ",'(..f)'.'""i 'Yfi H, 2? v v. in; invention relates totubes;'sueh as radio nd't e-1i ed'pa ular a oitube p o.- v kwi h m ora v n s desi ed a o stgueted to ipermitrthe tupesoto'zbe-eleetrical1y a e t L Q et-to: permit ct a eo tube without rupturingmr: mutilatingsank coverings. r1111 :the: .saleof radio tubesrnaridethe like, it; is the- Qustomary practige; to test the ,tubein the Pr s e q i he uwha e r-$9 a u h 1o ha ee ninea erfe e- Mamsed tubes whentested; give a positive result-with the qll me a the a so da ew-v en at-ns d mews d it bec me xha s ed du inga period .of time considerably lessuthan its is ranteed A aw que c i heus comp ains to thenufi ur and de a d zne lac r m nt- I -A ain m n d er q e qmnt y re -v turn: :twthem nufa t re -o un-mil:- u

tube a de t e on steima en h he nra t ws q l a e ns ejtw -ma t .qtu -=but al o te d ,tm e t v the pd w ll lhuiltup py I 2 a have found; that F I can, nverqomethey hev difiieulties by providing a protective covering-. r,ad-

2s iaeent n een ac -mmber ef a ubew th c duc ea s t permit elect ical c0n Q 1 to be 1 e ds; epith t-contact: me b r l he. be =having conducting means adapted to permit. testing, but notto--I Jermi;tr use 0nthe-.tube s;.without glisrupt'ingor mutilating the protective covering, -z0t er ob e o h ntionswin ap e irom: th cllowinad scrm append and aqcompan i 's dr win =formi rw t this specification-1and z nfiwhichz-zmu c;

Figure 1 i s-,a side elevation partly :in rseetion of a;' radio tube with one :fo rmiof proteating coverin an on aet em s Qo atingrwithhe contact;membensonprgngs;v2 r a am. Figure 2 is a partial view similar to. Figured v ofa=medifie z omn of. pmte ev ingm Figure 3 isa view similar to Figure 23111115- -.trating-a"1;1othe1r mQdifiecLfor-mmf proteeting eov; e nsvwith: odifiedi-e n etment Referringwto the! ernbpciiments of the nix-wen- 5 atio il ustr teeiinn ezdsaw ne en n rtieu arlav j" 5 mo -sis iaaZJI x l lli 58 35.9 if -fs-olaimsq loin-5042M) esses.t ep QpertY-Qf h in -t con id ab e c eere 2m -eoriverskzr mma Wet mad -s t iAsa ie -illustm e ex n of-m t r a s eh 'eratedgcellulosaueellulose acetate and} gelatin,- 1

roine Ei iire t n of an i v r d"cu -aha eiz ap 13- he h s v qi t tube, hus orming. a plea ed ki el-L mund! he sa lmetten eine i ped to; 'eure-tthe rm numera des n tes he b lb-9i ad obe 8'1Z: d':? ?'5f :2. 3 1 110 12 me th filamen san th i pur e ant Part W11. r el o t e ba ?he x osed-ee o; the 1mmisnmY dedi-Wit enlumhtwoi 1 teet "members r: 1 o a ges I y mea w im; w neddn-the wke s-thewh sp el d PWQrQ QJT QB l cir ui D s oseddneooij rat relation-with h ndsQL-th ne 'A-i an cond t ne d 1- whi h; ma :b f; ?3 p pier e e era ed el ulo t e'other uit b e ma r a -w eise v- -nmv ded w th c du r ing means, such as metal contacts 6.1 'I hes,e metal qqn aetsi marble u .d=; inen s i th n a yuitebl ma ner su h a pyk vet'in M ther 0ne-9ie talwnta s-e is d w t-Q1. w ntaet W thhe n wi=ea hsn n 4--= l'h i 54 s p r ed; an la n o a lvflzawrd: t er u ebl@-m@t :i& vh en a e W llihe bt om 'ot: the-- e@-' te ds f a st nce a pr m lyeq elto ex ose len h' fh ap en 1 smr w ec t hw a ts: t ethe a-: .i1v w9 @M mia r sonswhiehwfllbe m appar n the-ban v 9 r'p reie zebl o med i mat a w-w iqhd lso o ses his P o r y a =-b -m nt n r eeih 4 "Ijhe parts may baassemhled various ways.

Fo a ple; e andisma e v s e nd mmtai-n ain'z hewfi S a 1 mt l' -u B1-Pvfl l 'bQm sl e into-p s i mwt eband r t y o wets as i ad esi; a ingn annu ra se. rt a L o t at v the upper t re f: te e h disc Ba d i e- "Z 1 h be e 2-a d-i ;m an:-

qcntrec e e "1' at-th Ot e zsm -len ham hw iace t parb-o a e h reb pre n in h rb-an r9- rqm ei e lip e 5' Qfi-Q J neh th fo m-0f: th m n onil -us m n Ei -r i qntaets @areearriedJn-a disc rt h m n e cri edr c dis mr iom 1% rm h 0 P per cardhoa di o qth p suitable mate ia T ex lindrical portion 14 of the cup may be formeq in any'desired way as by drawing the edges; of a ats h e qfp pe li h ar bqarde wn ov i 9-pb -.W th:-t e ie e -ee e s fi' n a in th v ndstotth P e -m y e ec red nr siio by hr ekine n: l e a bandit e sui eb e 1 'tective covering illustrated in the various'iigures equally applicable to other types-of'tubes'.

.tion with incandescent lamps.

material, such as described in connection'with Figure 1. If desired, the lower edge 16 of the tubular portion of the cap may extend below the edge of the base 2 so as to be pressed inwardly by the band 15 to securely anchor the cap 13 to th base of the radiotube.

In theform of the invention illustrated in Figure 3, the disc 5 is provided with metal contacts in the form of metal eyelets 17 which permit easy alignment with the prongs of the tube. The eyelets may be riveted in apertures formed'in. "the disc 5. Each eyelet 17 is arranged with its aperture 18 over'the end of one prong 4. The

is factory new. By means of asuitable testing socket having prongsadapte'd to press against the metal contacts, it can be readily determined whether or not the tube is in perfect operating conditionby virtue of: the current from the testing socket passing through the metal contacts and the'contact prongs 4 of the tube,

To insert the tube in a circuit in'use, the proof the drawing is removedin any suitable way as by an implement, such as an ordinary pocket knife, or by tearing the covering off of'the base of the tube. V Y a I 5 Though the invention has been" described with specific reference to tubes having contact prongs, itis apparent that the principles thereof are For example, the invention'may be used'incombina- In such a case, a protective covering of paper, cardboard or other suitable material is disposed on the 'baseof a lamp with a metal contact member-in alignment with the center contactof the lamp, the covering being secured in position by means of-a band of regenerated cellulose or other suitable material-shrunk into positicnt'oenga'ge a portion only of the threaded peripheryof the base. By means of the metal contact member andthe exposed 'portion of the threaded base, the lamp may be Due to the fact that the band is disposed about part of the threads of thebase, it will be necessary to'remove the band'andpro- 'tecting covering before the lamp'canbe actually used. It will be obvious that the invention'may tested prior to use.

also be used in combinationwith incandescent lamps of the type which have end contacts'without any threaded peripheral'cont'acts on the base.

The invention may beembodied in other specific forms without departing from the spirit'or essential characteristics of the invention, and-the present embodiment of the invention is, therefore, tobe considered in all respects as illustrative and not restrictive, the scopeof the invention being indicated by the appended claims rather than by the foregoing description and all changes which come within the range of'equivalents'of the claims are therefore intended to be embraced therein. 7 Iclaimr 1. In combination with a tube having contact prongs extending from the base thereof whereby the tube may be-inserted in an electrical circuit and the filament and appurtenant elements of the tube may be energized, supporting means extending from the base toapproximately the v tactelements is elements is adjacent and adapted to engage "a I prong; and a band shrunk into position to seal 'shaped'cap, the skirtthereof' cooperating with the base of said tube and the top thereof being c said tube. i

plane of the prong ends, and a temporary pro tecting element supported on the supporting means and having a non-conducting covering provided with contact elements, each of which contact elements is adjacent and adapted to engage a prong.

;2. In combination with a tube having contact prongs extending from the 3 base thereofwhereby the tube may be inserted in an electrical cirwit and the filament and appurtenant elements of :the tube may be energized, supporting means extending from the base to approximately the plane of the prong ends, a temporary protecting element supportedon the supporting means and having a non-conducting covering-provided with contact elements, each of which contact elements is adjacent and adapted to engage a prong, and means to seal the supporting means and protectingelements to the base.

3. In combination with a tube having contact prongs extending from the base thereof whereby' the tube may be inserted in an electrical circuit and the filament and appurtenant elements of the tube may be. energized, supporting means extending fromthe' base to approximately the plane of -the'prong ends, atemporary protecting elesmentwsupportedon the supporting means and tecting element supported on thesupporting ring and having a non-conducting covering provided with contact elements, each of which cona prong;

I 5. In combination with a tubehaving COhtaCt prongs extending from the base thereof whereby the tube may be inserted in an electrical "ciring element supported on the supporting ring and having a non-conducting covering provided 1 With contact elements, each of which contact thesupporting means andprotecting element to the base. r Ti 6. In combination with atubfe having'contact prongs extending from the base'thereof where by the tube may be inserted in an electric'cir- -cuit and the filament and appurtenant elements I of the tube may,- beenergizezL-atemporary protecting element comprising' an inverted cupprovided with contact elements,'-each of which is adjacent and adapted to engage a prong of 7. In combination with a tube having contact, prongs extending from the base thereof 'where by the tube may be inserted in an electric circuit and. the filament and appurtenant elements of the tube may be energized, a temporary'protecting element comprising an inverted cup shaped 0 adjacent and adapted to enga e cap, the skirt thereof cooperating with the base of said tube and the top thereof being provided with contact elements, each of which is ad acent and adapted to engage a prong of said tube, and means to seal said cap in position.

8. In combination with a tube having contact prongs extending from the base thereof whereby the tube may be inserted in an electric circuit and the filament and appurtenant elements of the tube may be energized, a temporary protecting element comprising an inverted cupshaped cap, the skirt thereof cooperating with the base of said tube and the top thereof being provided with contact elements, each of which is adjacent and adapted to engage a prong of said tube, and a band cooperating with said skirt and tube base to seal said cap in position.

9. In combination with a tube having contact prongs extending from the base thereof whereby the tube may be inserted in an electric circuit and the filament and appurtenant elements of the tube may be energized, a temporary protecting element comprising an inverted, cupshaped cap, the skirt thereof cooperating with the base of said tube and the top thereof being provided with contact elements, each of which is adjacent and adapted to engage a prong of said tube, and a band shrunk in position, said band cooperating with said skirt and tube base i to seal said cap in position.

RAYMOND E. 'r. HAFF. 

